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        <ul><li><a href="#t01. 压缩与解压缩处理">1. 压缩与解压缩处理</a></li><li><a href="#t12. 压缩对象">2. 压缩对象</a></li><li><a href="#t23. 压缩和解压缩">3. 压缩和解压缩</a></li><li><a href="#t34. 在http中的应用">4. 在http中的应用</a></li><li><a href="#t45. 方法调用">5. 方法调用</a></li></ul>
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    <div class="content markdown-body">
        <h2 id="t01. &#x538B;&#x7F29;&#x4E0E;&#x89E3;&#x538B;&#x7F29;&#x5904;&#x7406;">1. &#x538B;&#x7F29;&#x4E0E;&#x89E3;&#x538B;&#x7F29;&#x5904;&#x7406; <a href="#t01. &#x538B;&#x7F29;&#x4E0E;&#x89E3;&#x538B;&#x7F29;&#x5904;&#x7406;"> # </a></h2>
<p>&#x53EF;&#x4EE5;&#x4F7F;&#x7528;<code>zlib</code>&#x6A21;&#x5757;&#x8FDB;&#x884C;&#x538B;&#x7F29;&#x53CA;&#x89E3;&#x538B;&#x7F29;&#x5904;&#x7406;,&#x538B;&#x7F29;&#x6587;&#x4EF6;&#x4EE5;&#x540E;&#x53EF;&#x4EE5;&#x51CF;&#x5C11;&#x4F53;&#x79EF;&#xFF0C;&#x52A0;&#x5FEB;&#x4F20;&#x8F93;&#x901F;&#x5EA6;&#x548C;&#x8282;&#x7EA6;&#x5E26;&#x5BBD;
<a href="https://github.com/zhufengnodejs/static-server/tree/master/lesson/zlib">&#x4EE3;&#x7801;</a></p>
<h2 id="t12. &#x538B;&#x7F29;&#x5BF9;&#x8C61;">2. &#x538B;&#x7F29;&#x5BF9;&#x8C61; <a href="#t12. &#x538B;&#x7F29;&#x5BF9;&#x8C61;"> # </a></h2>
<p>&#x538B;&#x7F29;&#x548C;&#x89E3;&#x538B;&#x7F29;&#x5BF9;&#x8C61;&#x90FD;&#x662F;&#x4E00;&#x4E2A;&#x53EF;&#x8BFB;&#x53EF;&#x5199;&#x6D41;</p>
<table>
<thead>
<tr>
<th style="text-align:left">&#x65B9;&#x6CD5;</th>
<th style="text-align:left">&#x8BF4;&#x660E;</th>
</tr>
</thead>
<tbody>
<tr>
<td style="text-align:left">zlib.createGzip</td>
<td style="text-align:left">&#x8FD4;&#x56DE;Gzip&#x6D41;&#x5BF9;&#x8C61;&#xFF0C;&#x4F7F;&#x7528;Gzip&#x7B97;&#x6CD5;&#x5BF9;&#x6570;&#x636E;&#x8FDB;&#x884C;&#x538B;&#x7F29;&#x5904;&#x7406;</td>
</tr>
<tr>
<td style="text-align:left">zlib.createGunzip</td>
<td style="text-align:left">&#x8FD4;&#x56DE;Gzip&#x6D41;&#x5BF9;&#x8C61;&#xFF0C;&#x4F7F;&#x7528;Gzip&#x7B97;&#x6CD5;&#x5BF9;&#x538B;&#x7F29;&#x7684;&#x6570;&#x636E;&#x8FDB;&#x884C;&#x89E3;&#x538B;&#x7F29;&#x5904;&#x7406;</td>
</tr>
<tr>
<td style="text-align:left">zlib.createDeflate</td>
<td style="text-align:left">&#x8FD4;&#x56DE;Deflate&#x6D41;&#x5BF9;&#x8C61;&#xFF0C;&#x4F7F;&#x7528;Deflate&#x7B97;&#x6CD5;&#x5BF9;&#x6570;&#x636E;&#x8FDB;&#x884C;&#x538B;&#x7F29;&#x5904;&#x7406;</td>
</tr>
<tr>
<td style="text-align:left">zlib.createInflate</td>
<td style="text-align:left">&#x8FD4;&#x56DE;Deflate&#x6D41;&#x5BF9;&#x8C61;&#xFF0C;&#x4F7F;&#x7528;Deflate&#x7B97;&#x6CD5;&#x5BF9;&#x6570;&#x636E;&#x8FDB;&#x884C;&#x89E3;&#x538B;&#x7F29;&#x5904;&#x7406;</td>
</tr>
</tbody>
</table>
<h2 id="t23. &#x538B;&#x7F29;&#x548C;&#x89E3;&#x538B;&#x7F29;">3. &#x538B;&#x7F29;&#x548C;&#x89E3;&#x538B;&#x7F29; <a href="#t23. &#x538B;&#x7F29;&#x548C;&#x89E3;&#x538B;&#x7F29;"> # </a></h2>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> zlib = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;zlib&apos;</span>);
<span class="hljs-keyword">var</span> fs = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;fs&apos;</span>);

<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">zip</span>(<span class="hljs-params">src</span>) </span>{
    <span class="hljs-keyword">var</span> gzip = zlib.createGzip();<span class="hljs-comment">//&#x521B;&#x5EFA;&#x538B;&#x7F29;&#x6D41;</span>
    <span class="hljs-keyword">var</span> inputStream = fs.createReadStream(src);
    <span class="hljs-keyword">var</span> outputStream = fs.createWriteStream(src+<span class="hljs-string">&apos;.gz&apos;</span>);
    inputStream.pipe(gzip).pipe(outputStream);
}
zip(<span class="hljs-string">&apos;source.txt&apos;</span>);

<span class="hljs-function"><span class="hljs-keyword">function</span> <span class="hljs-title">unzip</span>(<span class="hljs-params">src</span>)</span>{
    <span class="hljs-keyword">var</span> gunzip = zlib.createGunzip();
    <span class="hljs-keyword">var</span> inputStream = fs.createReadStream(src);
    <span class="hljs-keyword">var</span> outputStream = fs.createWriteStream(src.slice(<span class="hljs-number">0</span>,<span class="hljs-number">-3</span>));
    inputStream.pipe(gunzip).pipe(outputStream);
}

gnzip(<span class="hljs-string">&apos;source.txt.gz&apos;</span>);

</code></pre>
<h2 id="t34. &#x5728;http&#x4E2D;&#x7684;&#x5E94;&#x7528;">4. &#x5728;http&#x4E2D;&#x7684;&#x5E94;&#x7528; <a href="#t34. &#x5728;http&#x4E2D;&#x7684;&#x5E94;&#x7528;"> # </a></h2>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> zlib = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;zlib&apos;</span>);
<span class="hljs-keyword">var</span> fs = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;fs&apos;</span>);
<span class="hljs-keyword">var</span> http = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;http&apos;</span>);
http.createServer(<span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">request, response</span>) </span>{
    <span class="hljs-keyword">var</span> raw = fs.createReadStream(<span class="hljs-string">&apos;.&apos;</span> + request.url);
    <span class="hljs-keyword">var</span> acceptEncoding = request.headers[<span class="hljs-string">&apos;accept-encoding&apos;</span>];
    <span class="hljs-keyword">if</span> (!acceptEncoding) {
        acceptEncoding = <span class="hljs-string">&apos;&apos;</span>;
    }
    <span class="hljs-keyword">if</span> (acceptEncoding.match(<span class="hljs-regexp">/\bdeflate\b/</span>)) {
        response.setHeader(<span class="hljs-string">&apos;Content-Encoding&apos;</span>,<span class="hljs-string">&apos;deflate&apos;</span>);
        raw.pipe(zlib.createDeflate()).pipe(response);
    } <span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> (acceptEncoding.match(<span class="hljs-regexp">/\bgzip\b/</span>)) {
        response.setHeader(<span class="hljs-string">&apos;Content-Encoding&apos;</span>,<span class="hljs-string">&apos;gzip&apos;</span>);
        raw.pipe(zlib.createGzip()).pipe(response);
    } <span class="hljs-keyword">else</span> {
        raw.pipe(response);
    }
}).listen(<span class="hljs-number">9090</span>)
</code></pre>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> zlib = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;zlib&apos;</span>);
<span class="hljs-keyword">var</span> fs = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;fs&apos;</span>);
<span class="hljs-keyword">var</span> http = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;http&apos;</span>);

<span class="hljs-keyword">var</span> request = http.get({
    <span class="hljs-attr">host</span>: <span class="hljs-string">&apos;localhost&apos;</span>,
    <span class="hljs-attr">path</span>: <span class="hljs-string">&apos;/index.html&apos;</span>,
    <span class="hljs-attr">port</span>: <span class="hljs-number">9090</span>,
    <span class="hljs-attr">headers</span>: {
        <span class="hljs-string">&apos;accept-encoding&apos;</span>: <span class="hljs-string">&apos;gzip,deflate&apos;</span>
    }
})

request.on(<span class="hljs-string">&apos;response&apos;</span>, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">response</span>) </span>{
    <span class="hljs-keyword">var</span> output = fs.createWriteStream(<span class="hljs-string">&apos;test.txt&apos;</span>);
    <span class="hljs-keyword">switch</span> (response.headers[<span class="hljs-string">&apos;content-encoding&apos;</span>]) {
        <span class="hljs-keyword">case</span> <span class="hljs-string">&apos;gzip&apos;</span>:
            response.pipe(zlib.createGunzip()).pipe(output);
            <span class="hljs-keyword">break</span>;
        <span class="hljs-keyword">case</span> <span class="hljs-string">&apos;deflate&apos;</span>:
            response.pipe(zlib.createInflate()).pipe(output);
            <span class="hljs-keyword">break</span>;
        <span class="hljs-keyword">default</span>:
            response.pipe(output);
            <span class="hljs-keyword">break</span>;
    }
});
request.end();
</code></pre>
<h2 id="t45. &#x65B9;&#x6CD5;&#x8C03;&#x7528;">5. &#x65B9;&#x6CD5;&#x8C03;&#x7528; <a href="#t45. &#x65B9;&#x6CD5;&#x8C03;&#x7528;"> # </a></h2>
<pre><code class="lang-javascript"><span class="hljs-keyword">var</span> zlib = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;zlib&apos;</span>);
<span class="hljs-keyword">var</span> fs = <span class="hljs-built_in">require</span>(<span class="hljs-string">&apos;fs&apos;</span>);

<span class="hljs-keyword">var</span> out = fs.createWriteStream(<span class="hljs-string">&apos;input.log&apos;</span>);
<span class="hljs-keyword">var</span> input = <span class="hljs-string">&apos;input&apos;</span>;
zlib.gzip(input, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, buffer</span>) </span>{
    <span class="hljs-keyword">if</span> (!err) {
        zlib.unzip(buffer, <span class="hljs-function"><span class="hljs-keyword">function</span> (<span class="hljs-params">err, buffer</span>) </span>{
            <span class="hljs-keyword">if</span> (!err) {
                <span class="hljs-built_in">console</span>.log(buffer.toString());
                out.end(buffer);
            }
        })
    }
})
</code></pre>

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